cold room

[byrne]

Hi Guys

Looking at a cold room in my local and compressor is burned out.Can get a compressor but is slightly larger displacement but same gas r404a.Will i have to ajust explansion valve or require new to get correct superheat.cold room set point is 3°c.Any advice.

[chemi-cool]

how much is "slightly"?

[Rob White]

.

I agree with Chemies open question, plus I would
advise you to look at the rating. It might be a slightly
bigger comp but is it a low back pressure (LBP) or
high back pressure (HBP).

If you use a fridge compressor in a freezer application
it might not be suitable and visa-versa for a freezer
compressor in a fridge application.

In principle a comp that is just slightly bigger but compatible,
should have no issues replacing a similar but smaller comp.

Rob

.

[chemi-cool]

As always Rob, you pinpoint the qustion, so I will refrase my question,

Model and make of the old compressor and the new compressor.

That should give us the ability to judge.

[byrne]

Hi
The old compressor is BA18MG-1 off a heatcaft system r404a.The new compressor has a displacement of 16 and is hbp.(don't have model on me right now).Room will be running at 3°c, worried about low back pressure and superheat on system if compressor is too different.

[chemi-cool]

Tthis is a number of a condensing unit, medium temp and the compressor displacement is 18cc.
Looks like compressors they use are made by kirby.

[byrne]

Thanks new compressor is Embraco model-NT620GK.Would this do the job?

[chemi-cool]

It should work, diferences are minor, you might have to agjust the superheat but do that at one or two C above setpoint.

[byrne]

Thanks very much doing job 2mor let u know how it goes